Air filter for hot-air furnaces



D. HANDELAN.

AIR FILTER FOR HOT AIR FURNACES.

APPLICATION FILED IUNEZT, I921.

Patented Jim. 3, 1922 2 SHEETS-SHEET I.

, N M w m5 M NW R EA m "H M r I A F W 0 D. HANDELAN.

AIR FILTER FOR HOT AIR FURNACES.

APPLICATION FILED IUNEZT. I921.

Patented Jan. 3, 1922.

2 SHEETS-SHEET 2.

17y vE/vTOR W1. HANDELAN. 4

1 UNITED. STATES Damn mmnnmn, or Anmnnnn, souzrn DAKOTA.

AIR FILTER FOR HOT-AIR FURNACES.

Application filed June 27,

To all whomz't only concern:

Be it known that I, DANIEL HAN'DELAN, a citizen of the United States,residing at Aberdeen, in the county of Brown and State of South Dakota,have invented certain new and useful Improvements in Air Filters forHot-Air Furnaces, of which the following A jected to the action of waterin such manner 1 that the dust ;,and other impurities will be retainedor washed away, the air also being moistened during this operation. Anobject in particular is to provide a construction which will prevent the.dirt andmud which falls through' the hot air register from' gettingintothe hot' air chamber, especially connection with so-called pipeless hotair' furnaces. Y

The full objects and advantages of my invention will appear inconnection with the detailed description thereof and the novel featuresembodied in my inventive idea willbeIparticularly pointed out in theclaims. '7

n the accompanying drawings which illustrate the application of myinvention in two of the embodiments which it may assume,

Fig. 1 is a sectional elevational view showing my invention ap lied .toa common type of hot air furnace. ig. 2 is a fragmentary rearelevational view. Fig. 3 is a view in horizontal section on 'the line 33of Fig. 1.

Fig. 4 is a view in vertical section o'nthe line 4-.4 of Fig. 1. Fig. 51s a sectional elevational view of a somewhat different form A ofconstruction.

Referring to the form of invention shown in Figs. 1 to 4, the numeral 10designates ahot air furnace havin a hot air chamber 12 from the top ofwhic a hot air pipeleads. This hot' air pipe consists. of a horizontalsection 14 connecting with a vertical section 16 which extends up to ahot air register 18. As shown, the bottomof the section 16 is not closedbut. is provided with a bottom in the form of a truncated cone whichprovides an Specification of Letters Patent. Patented'Jan, 3, 1922,

1921. Serial 110.480,?43.

opening 20. Around the pipe section 16 and spaced therefrom is a pipe 22which leads from a cold air register 24 which is placed around the hotair register 18. 'The lower end of the pipe 22 at about the level of theopening 20 is preferably reduced to forma conical portion 24 whichconnects the pipe 22 with a casing 26'which' constitutes a filterlngchamber. The lower portion of this filtering chamber is connected by apipe 28 Wlth the lower portion of the .hot air chain-' her 12. The lowerside of the pipe 28 is preferably made in the form of a trough 3Oinclined downwardly toward the bottom of the filteringcham'ber in orderto carry water. which sprays into the pipe 28 backfinto the filteringchamber. water supply pipe 32, preferably controlled by a cock 34, leadsinto the upper portion of the filtering chamber and terminates centrallytherein in a nozzle 1 36 provided with perforations for producing i aconical spray of water. A discharge pipe 38 provided with atrap 40 leadsfrom thefiltering chamber, the inner end of this pipe terminatingslightly above the bottom ofthe casing "26. The pipe 38 may' beconnected With a sewer in order to carry away the water which overflowsfrom the filtering chamber. The casing 26 near its bottom is providedwith a clean-out door or slide 42, and the upper-portion of the casingis providedwith a door or slide 44 in order that access may be had tothe nozzle 46.

In the form of invention shown in Fig. 5 a hot air furnace 46 has a hotair. chamber 48 provided at itsupper end with an exten-'' sion 50 whichleads into a vertical hot air pipe 52, terminating in a hotairregi'ster54.

The lower portion of the pipe 52 terminates in a conical bottom 56 whichis connected by ,a pipe 58 with a casing 60 which constitutes v afiltering chamber. The casing 60 is 0011-, nected by a. pipe 62 with acold air register 64, and, as shown, another cold. air pi e 66 may'leadinto the pipe 62 from any su table place. A water supply pipe 68,preferably controlled by a cock portion of the filtering: chamber andterminutes centrally therein in a nozzle 72pm- 0, leads into the uppervided with perforations forflproducing a conical spray of water. Thelower portion of the filtering chamber is connected by a pipe. f l4withthe lower portion of the hot air chamber 48. 'The' lower sideof thepipe- 74 preferably connects with the casin 60 by means of a trough-likeportion 76 which carries back the water sprayed into the pipe 7 4 intothe filtering chamber. In this form of the invention there is shown atube 7 8 which extends through the casing 60 a short distance above thebottom thereof. A hose may be attached to this tube for carrying awaythe overflow water in cases where it is not desirable or practical-tomake connection directly with a sewer. The casing 60 near its bottom isprovided with a clean-out door or slide 80 and the upper portion of thecasing is provided with a door or slide 82 by means of which access maybe had to the nozzle 72.-

The operation and advantages of my invention will be obvious from theforegoing description. A current of cold air passes through thefiltering chamber and then into the hot air chamber. While passingthrough the filtering chamber the cold air is subjected to the action.of a spray of water which effectively washes out dust and impurities.Considerable moisture is carried by the current of cold air into the hotair chamber, so that the air which is delivered to the rooms to beheated is humidified as well as cleaned. An important feature of myinvention consists in providing a construction whereby any dirt and mudwhich falls through the hot air register goes into the filteringchamber, where it either settles or is washed away by the water. In thismanner such dirt and mud is prevented from getting into the hot airchamber and forming dust or particles to be carried back into the roomsby the hot air current. The provision of a discharge pipe near the lowerend of the filtering chamber preventscthe accumulation of too great aquantity of water therein and carries away the dirt which does notsettle to the bottom of this chamber. The dirt which accumulates at theas becomes desirable through the clean-out door. Y

I claim:

1. In combination with a. hot air furnace having a hot air chamber, acasing which. constitutes a filtering chamber, a passageway connectingthe lower portion of said casin with the lower portion of the hot aircham er, a pipe connected with the top of said filtering chamber forconveying a current of .cold air thereto, a water pipe leading into saidfiltering chamber, means on the inj ner end of said water pipe forproducing a spray of water in said filtering chamber, and anupwardly-extending hot air pipe for conveying hot air to a hot airregister, the bot,-

tom of said upwardly-extending pipe having an opening below the place ofadmission of hot air thereinto for passage into said filtering'chamberof dirt falling through the hot ail rcigister.

- fallin]g n combination with a hot air furnace having a hot airchamber, a casing which constitutes a filtering chamber, a passagewayconnecting the lower portion of said casing with the lower portion ofthe hot air chamber, a pipe connected with the top of said filteringchamber for conveying a current of cold air thereto, a water pipeleading into said filtering chamber, means on the inner end of saidwater pipe for producing a spray of water in said filtering chamber, apipe for conveying water from the bottom of said filtering chamber, andan upwardly-extending hot air pipe for conveying hot air to a hot airregister, the bottom of said upwardlyextending pipe having an openingbelow the place of admission of hot air thereinto for passage into saidfiltering chamber of dirt through the hot air register.

3. a combination with a hot air furnace having a hot air chamber, acasing which constitutes a filtering chamber, a passageway connectingthe lower portion of said casing with the lower portion of the hot airchamber a pipe connecting. a cold air register with the top of saidfiltering chamber for conveying a current of cold air thereto, a

water pipe leading into said filtering chamber, and means on the innerend of said water pipe for producing a spray of water insaid.

having a hot air chamber, a casing which constitutes a filteringchamber, a passage-'.

way connecting the lower portion of said casin with the lower portion ofthe hot air cham er, a pipe connecting a cold air register with the topof said filtering chamber for conveying a current of cold air thereto, awater pipe leading into said filtering chamber, means on the inner endof said water pipe for producing a spray of water in saidfiltering-chamber, and an upwardly-extendbottom may be removed from timeto time "111g;

a ct air register, the bottom of sald up-' hot air pipe for conveyinghot air to wardly-extending pipe having an opening below the place ofadmission of hot air thereinto for passage into said filtering chamberof dirtfalling through the hot air register. v p

5. In combination with a hot air furnace having a hot air chamber, acasing which constitutes a filterin chamber located directly below acold a1r register, a pipe con-;

necting the cold air register with the top of said filtering chamber forconveying a current of cold air thereto, a pipe connectmg the lowerportion of said casing with the lower portion of the hot air chamber, a

water pipe leading into said filtering chamber, means on the inner endof said water pipe. for producing a spray of water in said filteringchamber, and an upwardly-extending pipe for conveying hot air to a hotair register, the bottom. of said upwardly-ex tendingpipe-having anopening below the place of admission of-hot air thereinto for saidupwardly extending pipe, the bottom passage into said filtering chamberof dirt of said pipe having an opening below the fallin through the hotair register. vplace of admission of hot air thereinto for 6. ncombination with a hat air furnace passage of dirt falling through thehot air 5 having a hotair ehamber, an upwardly exregister whereby suchdirt is prevented from 15 tending hot air pipe for conveyingjhot airgetting into the hot air'chamber. to ahot air register, said pipe beingdisplaced In testimony whereof I hereunto aflix my laterall away fromover said hot air-chamsignature.

her, an alaterallyextendingmemberconnect- 10 ing the top of said hot aioliamber with DANIEL HANDELAN.

